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Home >> Chrysler >> 2013 >> 300 SRT-8 Core >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Transmission Control Module (TCM) - Electrical Diagnostics - Nag1 Automatic Transmission >> DTC Troubleshooting >> P1638-TCM Internal-Can 1 Ram Performance >> Possible Causes

Possible Causes

Possible Causes
TRANSMISSION CONTROL MODULE

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  NAG1 PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE   . 

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